I have a number assigned to my SIM but everytime I call my IPad a recorded voice say the number is incorrect.
And I don't have a way to dial from the IPad
Data lines can send and receive texts but are not provisioned to provide voice services. To make phone calls over a data line you will need to use a VoIP app like Skype, Viber, Hangouts or a SIP client.
Retrieving data ...
Manage your T-Mobile account
Use the T-Mobile App or your My T-Mobile account
We're here to help